6887129485 has 4 divisors (see below), whose sum is σ = 8264555388. Its totient is φ = 5509703584.

The previous prime is 6887129461. The next prime is 6887129489. The reversal of 6887129485 is 5849217886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1277419081 + 5609710404 = 35741^2 + 74898^2 .

It is a cyclic number.

It is not a de Polignac number, because 6887129485 - 2¹⁷ = 6886998413 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6887129489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688712944 + ... + 688712953.

It is an arithmetic number, because the mean of its divisors is an integer number (2066138847).

Almost surely, 2^6887129485 is an apocalyptic number.

It is an amenable number.

6887129485 is a deficient number, since it is larger than the sum of its proper divisors (1377425903).

6887129485 is a wasteful number, since it uses less digits than its factorization.

6887129485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377425902.

The product of its digits is 7741440, while the sum is 58.

The square root of 6887129485 is about 82988.7310723570. The cubic root of 6887129485 is about 1902.5938244114.

The spelling of 6887129485 in words is "six billion, eight hundred eighty-seven million, one hundred twenty-nine thousand, four hundred eighty-five".